Device for rolling logs



(No Eodel.) 'n l v J. VANDERVORT, Jf D. OWEN 8U A. L. VANDERVORT. v DEVICE FOR ROLLING LOGS.

No; 542,817. l Patented July 16,1895.

UNTTED STATES PATENT @Erica JoHN vANDERvoRT, JAMES D. OWEN, AND ARTHUR L. vANDERvoRT,A oE

LAcEYvILLE, PENNSYLVANIA.

DEVICE FOR ROLLING LOGS.

SPECIFICATION forming part of Letters Patent No. 542,817, dated July 16, l 895.

Application 'lled June 5, 1894. Serial No. 513,535. (No model.)

'To all whom it may concern:

Be it known that we, JOHN VANDERVORT, JAMES D. OWEN, and ARTHUR L. VANDER- VORT, citizens of the United States, residing at Laceyville, in the county of Vyoming and 'State of Pennsylvania, have invented certain new and useful Improvements in Devices for vRolling Logs; and we do hereby declare that erator may desire and be held secure while being operated by the device, which is entirely above the floor, and consequently can be operated equally as well in a mill close to the ground as one setting up fromthe ground.

These several objects above enumerated are attained by a device constructed substantially as shown in the drawings and hereinafter described and claimed.

Figure l of the drawings represents a longitudinal section of our improved device for turning logs, showing the tooth-bars in two positions in dotted and full lines, respectively, also a portion of the log and sawmill- 'carriage in dotted lines; Fig. 2, a plan View -of the device; Fig. 3, a detail sectional view on line of Fig. 2.

In the accompanying drawings,.A repre-l sents a suitable frame to which the several operating parts of the device are connected, and may be of an5T desirable size and construction as found best adapted to the purpose. This frame rests upon the oor and is located between the skids over which the logs are rolled with front end close to the carriagetrack.

A shaft B has its bearings in the frameA and vis provided with a pinion C, whichv meshes with the teeth of a gear-wheel D, said shaft extending along the door to the sawframe, where it is connected with the sawmandrel by meanspof suitable gearing or any well-known means by which a reversible motion may be obtained.

The gear-wheel D is cast with the shaft a.

and nuts d, engaging with the screw-threaded ends of the bolts. To the sections F of these frictional boxes are secu red slotted plates G, and these plates connect with the tooth-bars H by means of screws e, which extend through the slots in the plates and engage with screwthreaded holes in the bars, as shown in Fig. 2 of the drawings.v The slotted plates G project outward along the sides of the toothed bars H any desired distance, and by means of the screws e move the bars back and forth in bringingthem into and moving them back out of action'. The two sections E F clamp the enlarged part of the shaft between them with sufficient force to turn with the shaft either forward or back, as far as they are permitted to move, but not lto interfere with the movement lof the shaft.- Vhen the shaft is revolved forward the sections are raised by frictional contact alone with the shaft into the position shown in solid lines in Figs. l and 3,carrying the toothed. bars H through the plates G with them, and when the shaft is revolved backward the sections, plates, and bars are moved back into the position shown in dotted lines in Fig. l and solid lines in Fig. 2.

The sections E F and slotted plates G control the toothed bars H and serve as guides, upon which they move as they are reciprocated by their cams.

The ends of the hub or enlargements b are cast or otherwise suitably provided with cams I, which turns with the shaft a and operate in connection with the pinsf upon the inner sides of the' tooth-bars to alternately control the motion thereof. The tooth-bars have antifriction-rollers g, which bear against the periphery of the cams` and are located ICO Abeing cast with the bars.

It will be seen from the construction and means herein described that the tooth-bars are lifted by means of the cams and their connections therewith, and the cams so arranged with relation to each otherthat while one bar is moving up the other is moving down, thereby enabling the log to be kept on a continuous rolling motion.

When tightening the sections E F of the boxes by means of the bolts and nuts, the friction between the boxes and hubs or enlargements b will be correspondingly increased. The friction created by these wooden sections of the boxes with the hub or enlargements b is sufcient to lift and carry the tooth-bars over until the teeth thereof come in contact with the log and produce suflicient resistance to overcome the frictional resistance of the boxes upon the hub or enlargements b, thus enabling the latter to turn inside the boxes.

By the turning of the hub or enlargements b and also the shaft a, the cams I will be operated and their connection with the tooth-bars hereinbefore described will impart to the bars an up and down or vertical reciprocating motion and alternately, thereby imparting to the log a continuous rolling motion and at the same time holding the teeth firmly to the log. When the tooth-bars are in the position shown in dotted lines of Fig. 1, the bars are below the skids and entirely out of the way of the log and as soon as the log has passed the tooth-bars the device is put in motion by means of a suitable lever, the teeth catching on the log and keeping it rolling as long as required. When the log is in position for dogging, the operator may let go the lever and the device will hold the log firmly to the knees.l

Any number of tooth-bars may be employed and any suitable form and construction of cams maybe substituted for those shown, and any desirable connections between the toothbars and cams may be used, as well as any form of frictional devices may be employed and any preferred and well-known means for connecting them with the tooth-bars.

W'e do not wish to restrict-ourselves to any special means for bringing the tooth-bars from a substantially horizontal position to that of an upright or vertical position lto engage with the log and afterward imparting to the bars an alternately vertically-reciprocating motion to roll the log along, as these features of the invention are the essential ones that render the device valuable and important as a log-roller. Therefore any changes in the details of construction whereby these secured to the shaft, and the operating wheels,

the toothed bars being made to move in opposite directions, all combined to operate suhstantially as shown.

2. The shaft d., the toothed bars, and means secured to the shaft for causing the toothed bars to reciprocate, combined with the friction blocks or sections applied to the shaft, and connected at their outer ends to the bars, so as to move them into and out of action, substantially as described.

3. The toothed bars, slotted at their inner ends and each provided with a pin, or stud, and a friction roller; combined with the cams, secured to the operating shaft and which move the toothed rods in opposite directions; the shaft, provided with a driving wheel; and friction blocks applied to the shaft, and loosely connected at their outer ends to the toothed bars, so .as to form supports therefor, substantially as set forth.

4. In a log roller the shaft a provided with the enlarged parts b,and having the wheel D, and the two -cams I secured thereto; corn bined with the friction blocks secured to the enlarged parts of the shaft, and having slotted arms at their outer ends, and the toothed bars, slotted at their inner ends so as to pass over the shaft, provided with means for en gaging with the cams, and loosely connected to the slotted arms of the friction blocks, substantially as specified.

5. A device for rolling logs, consisting of a suitable frame, a rotatable shaft having cams connected thereto, tooth-bars connecting with the cams, and frictional boxes or devices connecting the tooth-bars with the shaft, substantially as and for the purpose specified.

6. A device for rolling logs, consisting of a suitable frame, a rotatable shaft having cams connected thereto, tooth-bars connecting with the cams, whereby a vertically and alternately reciprocating motion is imparted thereto, and sectional friction boxes connecting the shaft with the tooth-bars, and suitable gearing for imparting to the shaft a rotary motion, substantially as and for the purpose set forth.

In testimony that we claim the above we have hereunto subscribed our names in the presence of two witnesses.

JOHN VANDERVORT. JAMES D. OWEN. ARTHUR L. VANDERVORT.

Witnesses:

J. B. EDWARDS, M. S. CORNELL. 

